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windowscodecs: Implement conversion from 4bppIndexed to 32bppBGRA.

This commit is contained in:
Vincent Povirk 2009-08-13 14:01:39 -05:00 committed by Alexandre Julliard
parent 1a62109b70
commit 9c1db8d828
2 changed files with 60 additions and 0 deletions
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59
dlls/windowscodecs/converter.c
View File

@ -37,6 +37,7 @@ struct FormatConverter;
enum pixelformat {
format_1bppIndexed,
format_4bppIndexed,
format_16bppBGR555,
format_16bppBGR565,
format_24bppBGR,
@ -131,6 +132,63 @@ static HRESULT copypixels_to_32bppBGRA(struct FormatConverter *This, const WICRe
return res;
}
return S_OK;
case format_4bppIndexed:
if (prc)
{
HRESULT res;
UINT x, y;
BYTE *srcdata;
UINT srcstride, srcdatasize;
const BYTE *srcrow;
const BYTE *srcbyte;
BYTE *dstrow;
DWORD *dstpixel;
WICColor colors[16];
IWICPalette *palette;
UINT actualcolors;
res = PaletteImpl_Create(&palette);
if (FAILED(res)) return res;
res = IWICBitmapSource_CopyPalette(This->source, palette);
if (SUCCEEDED(res))
res = IWICPalette_GetColors(palette, 16, colors, &actualcolors);
IWICPalette_Release(palette);
if (FAILED(res)) return res;
srcstride = (prc->Width+1)/2;
srcdatasize = srcstride * prc->Height;
srcdata = HeapAlloc(GetProcessHeap(), 0, srcdatasize);
if (!srcdata) return E_OUTOFMEMORY;
res = IWICBitmapSource_CopyPixels(This->source, prc, srcstride, srcdatasize, srcdata);
if (SUCCEEDED(res))
{
srcrow = srcdata;
dstrow = pbBuffer;
for (y=0; y<prc->Height; y++) {
srcbyte=(const BYTE*)srcrow;
dstpixel=(DWORD*)dstrow;
for (x=0; x<prc->Width; x+=2) {
BYTE srcval;
srcval=*srcbyte++;
*dstpixel++ = colors[srcval>>4];
if (x+1 < prc->Width) *dstpixel++ = colors[srcval&0xf];
}
srcrow += srcstride;
dstrow += cbStride;
}
}
HeapFree(GetProcessHeap(), 0, srcdata);
return res;
}
return S_OK;
case format_16bppBGR555:
if (prc)
{
@ -311,6 +369,7 @@ static HRESULT copypixels_to_32bppBGR(struct FormatConverter *This, const WICRec
static const struct pixelformatinfo supported_formats[] = {
{format_1bppIndexed, &GUID_WICPixelFormat1bppIndexed, NULL},
{format_4bppIndexed, &GUID_WICPixelFormat4bppIndexed, NULL},
{format_16bppBGR555, &GUID_WICPixelFormat16bppBGR555, NULL},
{format_16bppBGR565, &GUID_WICPixelFormat16bppBGR565, NULL},
{format_24bppBGR, &GUID_WICPixelFormat24bppBGR, NULL},

1
dlls/windowscodecs/regsvr.c
View File

@ -790,6 +790,7 @@ static struct regsvr_decoder const decoder_list[] = {
static GUID const * const converter_formats[] = {
&GUID_WICPixelFormat1bppIndexed,
&GUID_WICPixelFormat4bppIndexed,
&GUID_WICPixelFormat16bppBGR555,
&GUID_WICPixelFormat16bppBGR565,
&GUID_WICPixelFormat24bppBGR,